Mitsubishi Electric FR-E720-0.1KNC Instruction Manual page 187

Operation selection at power failure and instantaneous power failure
2) Monitor is displayed on the operation panel during tuning as below.
Pr. 96 setting
(1) Setting
(2) Tuning in progress
(3) Normal end
(4) Error end
(when inverter protective function
operation is activated)
Reference: Offline auto tuning time (when the initial value is set)
Offline Auto Tuning Setting
Tune motor constants (R1) only
(Pr. 96 = "21")
3) When offline auto tuning ends, press
mode, turn OFF the start command via CC-Link communication.
This operation resets the offline auto tuning and the operation panel monitor display returns to the normal indication.
(Without this operation, next operation cannot be started.)
REMARKS
Do not change the Pr. 96 setting after completion of tuning (23).
If the Pr. 96 setting is changed, tuning data is invalid.
If the Pr. 96 setting is changed, tuning must be performed again.
4) If offline auto tuning ended in error (see the table below), motor constants are not set.
Perform an inverter reset and restart tuning.
Error
Display
8 Forced end
9 Inverter protective function operation
Current limit (stall prevention) function was
91
activated.
Converter output voltage reached 75% of rated
92
value.
Calculation error
93
A motor is not connected.
5) When tuning is ended forcibly by pressing
auto tuning does not end normally. (The motor constants have not been set.)
Perform an inverter reset and restart tuning.
6) After the tuning completes, set Pr. 9 Electronic thermal O/L relay again for the motor with the rated power supply of 200/
220V(400/440V) 60Hz. Set the rated motor current multiplied by 1.1 in Pr. 9.
184
Operation Panel Indication
21
Flickering
Approx. 9s (Tuning time differs according to the inverter capacity
and motor type.)
of the operation panel during PU operation. In the Network operation
Error Cause
or turning OFF the start signal (STF or STR) during tuning, offline
Time
Remedy
Set "21" in Pr. 96 and perform tuning again.
Make setting again.
Set "1" in Pr. 156.
Check for fluctuation of power supply voltage.
Check the motor wiring and make setting again.
Set the rated current of the motor in Pr. 9.